<template>
<div>
    <div class="search">
        <input v-model="keywore" class="search-input" type="text" placeholder="输入城市名或拼音">
    </div>
    <div class="search-content"
         ref="search"
         v-show="keywore"
         >
        <ul>
            <li class="search-item border-bottom" 
            v-for="item of list"
             :key="item.id"
             @click="handleCityClick(item.name)"
             >
                {{ item.name }}
            </li>
            <li class="search-item border-bottom" v-if="hasNodata">
                没有找到匹配城市
            </li>
        </ul>
    </div>
</div>
</template>
<script>
import Bscroll from 'better-scroll'
import { mapMutations } from 'vuex'
export default {
    name:'CitySearch',
    props:{
        cities:Object
    },
    data () {
        return {
            keywore:'',
            list:[],
            timer:null
        }
    },
    computed:{
        hasNodata (){
            return !this.list.length
        }
    },
    watch:{
        keywore(){
            if(this.timer){
                clearTimeout(this.timer)
            }
            if(!this.keywore){
                this.list=[]
                return 
            }
            this.timer = setTimeout(()=>{
                const result  = []
                for (let i in this.cities){
                    this.cities[i].forEach((value)=>{
                        if(value.spell.indexOf(this.keywore) > -1 || 
                        value.name.indexOf(this.keywore) >-1){
                            result.push(value)
                        }
                    })
                }
                this.list = result
            },100)
        }
    },
     methods:{
        handleCityClick(city){
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations(['changeCity'])

    },
    mounted(){
        this.scroll = new Bscroll(this.$refs.search)
    }
}
</script>
<style lang='stylus' scoped>
 @import '~styles/varibles.styl'
.search
    height .72rem
    padding 0 .1rem
    background $bgColor
.search-input 
    box-sizing border-box
    width 100%
    height .62rem
    padding 0 .1rem
    line-height .62rem
    text-align center
    border-radius .06rem
    color #666
.search-content
    z-index 1
    overflow hidden
    position absolute
    top 1.58rem
    left 0
    right 0
    bottom 0
    background #eee
    .search-item
        line-height .62rem
        padding-left .2rem
        color #666
        background #fff
</style>